Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van tham » van thanh, van tuan, van chat
va tham » va cham, va thanh, va thuat
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
loc va » luc va
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v nang x hoi. lieu ((va tham) OR (van tham)) ((hoc va) or (loc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang x hoi. lieu ((va tham) OR (van tham)) ((hoc va) OR (loc va)) hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v nang x hoi. lieu ((va tham) OR (van tham)) ((hoc va) or (loc va)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach v nang x hoi. lieu ((va tham) OR (van tham)) ((hoc va) or (loc va)) hanh di cua tre*.